Aug 02 15:26:02.472 INFO checking RustyXML-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 15:26:02.472 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 15:26:02.472 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 15:26:02.472 INFO running `"docker" "create" "-v" "/tmp/crater.IejpyBHgTEUw:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 15:26:02.755 INFO blam! 4ef0acc478d5a19453b7203ad75e538d59886e0b253b066d373370ead55a2d68
Aug 02 15:26:02.757 INFO running `"docker" "start" "-a" "4ef0acc478d5a19453b7203ad75e538d59886e0b253b066d373370ead55a2d68"`
Aug 02 15:26:03.949 INFO kablam!     Checking RustyXML v0.1.1 (file:///source)
Aug 02 15:26:04.451 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 15:26:04.451 INFO kablam!   --> src/lib.rs:13:19
Aug 02 15:26:04.451 INFO kablam!    |
Aug 02 15:26:04.451 INFO kablam! 13 | #![cfg_attr(test, feature(test))]
Aug 02 15:26:04.451 INFO kablam!    |                   ^^^^^^^^^^^^^^
Aug 02 15:26:04.451 INFO kablam! 
Aug 02 15:26:04.454 INFO kablam! error: aborting due to previous error
Aug 02 15:26:04.454 INFO kablam! 
Aug 02 15:26:04.454 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 15:26:04.459 INFO kablam! error: Could not compile `RustyXML`.
Aug 02 15:26:04.459 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 15:26:04.917 INFO kablam! error: build failed
Aug 02 15:26:04.917 INFO kablam! su: No module specific data is present
Aug 02 15:26:05.558 INFO running `"docker" "rm" "-f" "4ef0acc478d5a19453b7203ad75e538d59886e0b253b066d373370ead55a2d68"`
Aug 02 15:26:05.734 INFO blam! 4ef0acc478d5a19453b7203ad75e538d59886e0b253b066d373370ead55a2d68